Fig. 4From: Comparison of two methods of locating proximal femoral nail anti-rotation in the treatment of femoral intertrochanteric fracturesAO fracture classification. (A2) Transtrochanteric comminuted fracture, medial, and posterior bone cortex comminuted in more than two planes, lateral cortex intact. (A2.1) One medial fracture. (A2.2) More than two medial fracture blocks. (A2.3) The fracture line extending more than 1 cm under the lesser trochanterBack to article page